Water ponding on a deck or balcony surface or permanent stains due to improper slope or drainage devices can be indicators of deck and balcony problems. Other problems include improper flashings, sealants or coatings and improper deck/balcony attachment to the structure.

Improper design and construction can be the beginning of many problems that can result in structural failure of the deck or balcony. Property owners should look for exterior stucco or interior drywall cracking and any staining due to possible water intrusion, which can lead to mold or dry-rot.